Grok Code Fast 1 vs Grok 4 Fast
Grok 4 Fast is cheaper on output tokens, while Grok 4 Fast offers a larger context window. Choose Grok Code Fast 1 or Grok 4 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok Code Fast 1 | Grok 4 Fast |
|---|---|---|
| Provider | ZenMux | ZenMux |
| Input / 1M tokens | $0.20 | $0.20 |
| Output / 1M tokens | $1.50 | $0.50 |
| Context window | 256K | 2M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Aug 2025 | Sep 2025 |
FAQ
Is Grok Code Fast 1 or Grok 4 Fast cheaper?
Grok 4 Fast is cheaper on output tokens ($0.50 vs $1.50 per 1M).
Which has the larger context window, Grok Code Fast 1 or Grok 4 Fast?
Grok 4 Fast has the larger context window (2M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.